Teledyne T100, Инструкция по эксплуатации, Страница: 306 / 404

are still trapped and can still build to high enough levels to cause damage when
they are discharged.
A charge can be induced onto the conductive surface and/or discharge triggered in
the presence of a charged field such as a large static charge clinging to the surface
of a nylon jacket of someone walking up to a workbench.

As long as my analyzer is properly installed, it is safe from damage caused by static
discharges
: It is true that when properly installed the chassis ground of your analyzer is tied
to earth ground and its electronic components are prevented from building static electric
charges themselves. This does not prevent discharges from static fields built up on other
things, like you and your clothing, from discharging through the instrument and damaging it.
11.4. BASIC PRINCIPLES OF STATIC CONTROL
It is impossible to stop the creation of instantaneous static electric charges. It is not,
however difficult to prevent those charges from building to dangerous levels or prevent
damage due to electro-static discharge from occurring.
11.4.1. GENERAL RULES
Only handle or work on all electronic assemblies at a properly set up ESD station. Setting
up an ESD safe workstation need not be complicated. A protective mat properly tied to
ground and a wrist strap are all that is needed to create a basic anti-ESD workstation
(refer to figure 12-2).
Wrist Strap
Protective Mat
Ground Point
Figure 11-2: Basic anti-ESD Work Station
For technicians that work in the field, special lightweight and portable anti-ESD kits are
available from most suppliers of ESD protection gear. These include everything needed
to create a temporary anti-ESD work area anywhere.

Always wear an Anti-ESD wrist strap when working on the electronic assemblies of
your analyzer
. An anti-ESD wrist strap keeps the person wearing it at or near the same
potential as other grounded objects in the work area and allows static charges to dissipate
before they can build to dangerous levels. Anti-ESD wrist straps terminated with alligator
clips are available for use in work areas where there is no available grounded plug.
Also, anti-ESD wrist straps include a current limiting resistor (usually around one
meg-ohm) that protects you should you accidentally short yourself to the
instrument’s power supply.